[Bug 1055072] Re: No display backlight during plymouth bootscreen

[Jonas Schwabe]

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Title:
  No display backlight during plymouth bootscreen

Status in “plymouth” package in Ubuntu:
  New

Bug description:
  I installed 12.10 with full disc encryption and therefore need to put my password in every time I boot my laptop.
  The input field is only visible on every second boot (when the Grub menu was visible beforehand). I did some further testing and found out that I the password is accepted even if the field is not visible.
  When I booted last time I saw a very dark image on the screen, with disabled back light. Enabling the back light (Fn + F5 on my system) works without problems.
  Short time before the login screen becomes visible the display gets bright and few seconds of Plymouth (mouspointer is already visible etc.) are shown.

  What I expected:
  Plymouth takes care about enabling the back light.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: plymouth 0.8.4-0ubuntu3
  ProcVersionSignature: Ubuntu 3.5.0-15.22-generic 3.5.4
  Uname: Linux 3.5.0-15-generic x86_64
  ApportVersion: 2.5.2-0ubuntu4
  Architecture: amd64
  Date: Sun Sep 23 17:54:45 2012
  DefaultPlymouth: /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Beta amd64+mac (20120922)
  MachineType: Dell Inc. Vostro 3350
  ProcCmdLine: BOOT_IMAGE=/vmlinuz-3.5.0-15-generic root=/dev/mapper/ubuntu-root ro quiet splash vt.handoff=7
  ProcFB:
   0 inteldrmfb
   1 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.5.0-15-generic root=/dev/mapper/ubuntu-root ro quiet splash vt.handoff=7
  SourcePackage: plymouth
  TextPlymouth: /lib/plymouth/themes/ubuntu-text/ubuntu-text.plymouth
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/30/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A07
  dmi.board.name: 0M516T
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A07
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.modalias: dmi:bvnDellInc.:bvrA07:bd09/30/2011:svnDellInc.:pnVostro3350:pvrNotSpecified:rvnDellInc.:rn0M516T:rvrA07:cvnDellInc.:ct8:cvrNotSpecified:
  dmi.product.name: Vostro 3350
  dmi.product.version: Not Specified
  dmi.sys.vendor: Dell Inc.

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